body,ul,li,dl,dt,dd,p,ol,h1,h2,h3,h4,h5,h6,form,img,table,fieldset,legend{
    margin: 0;
    padding: 0;
  }
  body{
    font-family: '微软雅黑';
    font-size: 12px;
  }
  
  h1,h2,h3,h4,h5,h6,strong,b{
    font-weight: normal;
  }
  ul,li,ol{
    list-style: none;
  }
  a,u{
    text-decoration: none;
  }
  em,i{
    font-style: normal;
  }
  img{
    display: block;
  }
  input{
    border: 0;
    outline: none;
  }
  a{
    color: #333;
  }
  
  .fl{
    float: left;
  }
  .fr{
    float: right;
  }
  
  /* 解决高度塌陷 */
  .clean:after{
    content: '';
    display: block;
    clear: both;
  }
  .clean{
    zoom: 1;
  }